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Deleting, Moving and Copying Text
• To delete a character, use [Ctrl-d]. To delete a word, use [Alt-d].
• To delete text from the current cursor position to the end of line, use [Ctrl-k].
• To delete the entire line, first use [Ctrl-a] and then [Ctrl-k][Ctrl-k].
• To delete text in a region, first mark the region and then use [Ctrl-w].
Deleting, Moving and Copying Text
• [Ctrl-y] is universally used to restore text from the deletion.
• While [Ctrl-w] deletes text in a region, the command to copy text is [Alt-w].
• You can transpose two adjacent characters by using [Ctrl-t].
Changing Case of Text
• To convert an entire word to uppercase, move to the beginning of the word and then press [Alt-u].
• You use [Alt-u] for converting a word to lowercase.
• To capitalize a single character, position the cursor under it and then use [Alt-c].
Changing Case of Text and Command Completion
• For transforming case in large blocks of text, use a region. The commands to convert text in a region are: [Ctrl-x][Ctrl-u] and [Ctrl-x][Ctrl-l].
• The command completion feature can reduce some of the typing work.
• The guiding principle here is this: Enter as much of the command text as you want and then press the [Tab] key.
Undoing and Redoing Editing
• To undo the change, there are three ways: [Ctrl-x]u, [Ctrl-_], [Ctrl--].
• If you continue to press [Ctrl--], you’ll undo the changes made before the last save.
• If you keep pressing [Ctrl--], emacs starts redoing everything that you have undone.
String Search
• The incremental and non-incremental search techniques are used in string search in emacs.
• Incremental search is invoked with [Ctrl-s] followed by the search string.
• After entering [Ctrl-s] emacs prompts for the search string in the minibuffer. Suppose you’re looking for mail. After m is entered, the search starts immediately.
String Search
• The cursor relocates itself at the first instance of m – maybe on the word moon.
• After mail is entered, press [Enter].
• There are a number of advantages of using incremental search:– The search is faster.– emacs tells you instantly whether the string
exists in the file.– If there is a typo, backspacing erases the error.
String Search• At the end of a file, use [Ctrl-r] instead of
[Ctrl-s].• To repeat a search, you’ll have to use the
same command – [Ctrl-s] or [Ctrl-r].• In non-incremental search just press [Enter]
and then type the string.• Like vi, emacs uses a pattern comprising
some special characters to look for similar strings. This pattern is called a regular expression.
